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I think the original reason was that viewfinders were not very good, so you wanted to be able to look directly through the lens with a mirror.
by elliottkember 5y ago
I think the original reason was that viewfinders were not very good, so you wanted to be able to look directly through the lens with a mirror.
- andi999 5y agoBrightness was also a problem.
- staticautomatic 5y agoExcept for rangefinders.